CN104819440A - Light guide plate, manufacturing method for light guide plate and backlight module - Google Patents
Light guide plate, manufacturing method for light guide plate and backlight module Download PDFInfo
- Publication number
- CN104819440A CN104819440A CN201510229644.2A CN201510229644A CN104819440A CN 104819440 A CN104819440 A CN 104819440A CN 201510229644 A CN201510229644 A CN 201510229644A CN 104819440 A CN104819440 A CN 104819440A
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- China
- Prior art keywords
- light guide
- guide plate
- transparent panel
- frame bar
- plate according
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to a light guide plate, a manufacturing method for the light guide plate and a backlight module. The light guide plate comprises a transparent plate and a frame strip which is arranged on the side of the transparent plate, extends in parallel with the side and is formed integrally with the transparent plate. One side of the frame strip close to the light emitting face of the transparent plate protrudes from the plane of the light emitting face to form a first retaining wall for locating optical film. The backlight module comprises the light guide plate. When the optical film is assembled on the light guide plate, the first retaining wall can be used for locating the optical film, and accordingly, a rubber frame can be omitted. Meanwhile, the frame strip is integrated with the transparent plate, the frame strip wall thickness can be small and can be smaller than the wall thickness (0.8mm) of the rubber frame in the background technology, and the problem that the frame strip is not easy to assemble is prevented.
Description
Technical field
The present invention relates to a kind of lcd technology, particularly light guide plate and preparation method thereof, backlight module.
Background technology
Fig. 1 shows a kind of existing liquid crystal panel.This liquid crystal panel comprises backlight module and is pasted onto the liquid crystal display 1 on backlight module.Backlight module is used as the light source of liquid crystal panel.Liquid crystal display 1 carries out modulation by the light sent backlight module and demonstrates figure and color.
Backlight module comprises light guide plate 2, lamp bar 5, glue frame 3, reflector plate 8, blooming piece 7 and backboard 4.In FIG, light guide plate 2 is incidence surface towards the side on the right side, and light guide plate plate face is upward exiting surface.Lamp bar 5 is provided with light-emitting component (not shown), light-emitting component can be such as light emitting diode.Lamp bar 5 is arranged on the incidence surface side of light guide plate 2, lamp bar 5 is provided with the side of light-emitting component towards light guide plate 2.Reflector plate 8 is arranged on light guide plate 2 plate face down, and reflector plate 8 can reflection ray.The light that light-emitting component sends incides in light guide plate 2 from the incidence surface of light guide plate 2, these light in light guide plate 2 through one or many reflection after penetrate from the exiting surface of light guide plate 2.Blooming piece 7 is arranged on the exiting surface of light guide plate 2, is used for improving the characteristic of backlight module.Blooming piece 7 can be the diffusion sheet, prismatic lens and the blast sheet that stack gradually.Backboard 4 is in square disc shape roughly.Backboard 4 is in rectangular disk structure roughly.
Glue frame 3 is rectangle frame structure.Glue frame 3 is generally made up of PC material (i.e. Merlon).Glue frame 3 is around light guide plate 2, lamp bar 5 and blooming piece 7, and periphery wall is connected to backboard 4.Like this, light guide plate 2, lamp bar 5, glue frame 3, reflector plate 8, blooming piece 7 are relative with backboard 4 to be fixed, then adopts black double-sided glue 6 backlight module and liquid crystal display 1 to be bonded together just to be assembled into liquid crystal panel.
Glue frame 3 protrudes from the exiting surface of light guide plate 2, may be used for light guide plate 2, the location between lamp bar 5 and blooming piece 127 when assembling backlight module.Such as, after light guide plate 2, lamp bar 5 and glue frame 3 being assembled, the part that glue frame 3 exceeds light guide plate 2 has then become location barricade, is conveniently pasted on light guide plate 2 by blooming piece 7.
Along with the development of mobile communication product and panel computer, a lot of manufacturer with " narrow frame " for attraction attracts consumer.The wall thickness of glue frame 3 then directly has influence on the border width of this liquid crystal indicator, and the less then border width of wall thickness of usual glue frame 3 is less, and the clean screen accounting of liquid crystal indicator is larger.But when the wall thickness of glue frame 3 is lower than 0.8mm, glue frame 3 very easily deformation occurs, the assembling of backlight module is very difficult.
Summary of the invention
For above-mentioned technical problem, the present invention proposes a kind of light guide plate, comprise: transparent panel and be arranged on transparent panel side, be parallel to that side extends and frame bar integrated with transparent panel, frame bar protrudes from exiting surface place plane to be formed for the first barricade of positioning optical diaphragm near the side of the exiting surface of transparent panel.
In a specific embodiment, the hardness of frame bar is greater than the hardness of transparent panel.
In a specific embodiment, transparent panel is rectangular slab, and the two ends of frame bar extend to two relative ends of transparent panel respectively.
In a specific embodiment, the side that frame bar deviates from the first barricade is concordant with the plate face that transparent panel deviates from exiting surface.
In a specific embodiment, frame bar is white towards the surface color of the side of transparent panel.
In a specific embodiment, transparent panel is polymethyl methacrylate product, and frame bar is polyphthalamide goods, and light guide plate adopts two-shot molding process to make.
In a specific embodiment, three frame bars are separately positioned on three sides of transparent panel.
In a specific embodiment, exiting surface does not arrange the outwardly formation second in the side barricade of frame bar.
The invention allows for a kind of method making light guide plate described above, it comprises the following steps:
The polyphthalamide of fusing is injected in the first mould, after the polyphthalamide cooling in described first mould, forms frame bar as above;
Described frame bar is placed in the second mould, inject in described second mould fusing and temperature lower than the polymethyl methacrylate of the vicat softening temperature of polyphthalamide, after the polymethyl methacrylate cooling in described second mould, form transparent panel as above.
The invention allows for a kind of backlight module, it comprises: light guide plate as above, and covers the blooming piece on exiting surface, and the side of blooming piece is connected to the first barricade.
When being assembled on light guide plate by blooming piece, the first barricade can be used for positioning optical diaphragm, can omit glue frame like this.Simultaneously, frame bar and the one-body molded setting of transparent panel, the wall thickness of frame bar can arrange less, can be less than the glue frame described in background technology wall thickness (0.8mm) and can not produce frame bar assembling not easily with the problem of easy deformation, be conducive to the realization of narrow frame design.Especially, when assembling backlight module, not needing the assembling carrying out glue frame, saving one processing step.
Accompanying drawing explanation
Also will be described in more detail the present invention with reference to accompanying drawing based on embodiment hereinafter.Wherein:
Fig. 1 shows a kind of complete section schematic diagram of existing liquid crystal panel;
Fig. 2 shows the complete section schematic diagram of the backlight module of one embodiment of the present invention;
Fig. 3 shows the schematic perspective view of the light guide plate in Fig. 2.
In the accompanying drawings, identical parts use identical Reference numeral.Accompanying drawing is not according to the scale of reality.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 2 shows the backlight module 10 of one embodiment of the present invention.Backlight module 10 comprises light guide plate 11 and is arranged on the blooming piece 12 on light guide plate 11.
As shown in Figure 3, light guide plate 11 comprises transparent panel 13 and frame bar 16 integrated with transparent panel 13.Transparent panel 13 is made up of the transparent material that refractive index is higher usually.This transparent material can be the polymethyl methacrylate of optical grade.Transparent panel 13 is substantially rectangular platy structure.A plate face of transparent panel 13, namely the first plate face 14 is formed as exiting surface; Another plate face, namely relative with the first plate face 14 face is the second plate face 15.Except the second plate face 15, other surface of transparent panel 13, such as each side, the first plate face 14 etc. be unusual light all.Preferably, the some parts on the second plate face 15 of transparent panel 13 is outwardly, thus forms intensive reflective site.One of them side of transparent panel 13 is incidence surface.
Frame bar 16 is configured to elongate configuration.Frame bar 16 is preferably the elongate configuration that cross section is rectangle.Frame bar 16 is arranged at least one side of transparent panel 13, and extends along this side.The side (namely near the side of the exiting surface of transparent panel 13) that frame bar 16 deviates from the first plate face 14 of transparent panel 13 protrudes from exiting surface place plane, and like this, the part that frame bar 16 exceedes exiting surface place plane forms the first barricade 19.Blooming piece 12 is arranged on the exiting surface of transparent panel 13, and when being assembled on light guide plate 11 by blooming piece 12, the first barricade 19 can be used for positioning optical diaphragm 12, can omit the glue frame described in background technology like this.Meanwhile, frame bar 16 and the one-body molded setting of transparent panel 13, the wall thickness of frame bar 16 can arrange less, can be less than the wall thickness (0.8mm) of the glue frame described in background technology and can not produce frame bar 16 and assemble problem not easily.
Preferably, the hardness of frame bar 16 is greater than the hardness of transparent panel 13.Frame bar 16 preferably adopts polyphthalamide to make.The bend yield strength noted of polyphthalamide is larger.Like this, frame bar 16 is equivalent to the reinforcement of transparent panel 13, can resist the moment of flexure perpendicular to the first plate face 14 that transparent panel 13 is subject to, and protects softer transparent panel 13.The wall thickness of frame bar 16 can be designed to be narrow as far as possible, such frame bar 16 and is difficult to resist perpendicular to the moment of flexure of the side of transparent panel 13 aborning.But transparent panel 13 is in platy structure, and transparent panel 13 resistance to vertical is comparatively strong in the ability of the moment of flexure of its side, can resist the moment of flexure perpendicular to transparent panel 13 side well.Thus, form complementation between frame bar 16 and transparent panel 13, strengthen the structural strength of light guide plate 11.
Preferably, the two ends of frame bar 16 extend to two relative ends of transparent panel 13 respectively.Like this, the two ends of frame bar 16 extend to the two ends of the side of the transparent panel 13 that it abuts, the corresponding side surface of transparent panel 13 that made frame bar 16 completely coated, strengthen the structural strength that this transparent panel 13 is provided with frame bar 16 side entirety.Meanwhile, the first barricade 19 also extends to the two ends of transparent panel 13 to protect blooming piece 12, avoids blooming piece 12 to be collided with near the side of the first barricade 19 and rolls, comes off.
Preferably, to deviate from the bottom surface of the first barricade 19 concordant with the second plate face 15 of transparent panel 13 for frame bar 16.Like this, light guide plate 11 deviates from the plate face of exiting surface is smooth plane.Usually, the reflector plate (not shown in Fig. 2) of backlight module 10 pastes light guide plate 11 and deviates from the plate face of exiting surface, each bar limit of reflector plate all deviates from light guide plate 11 that the plate face of exiting surface is corresponding aligns, and is so just conducive to reflector plate to be entirely assembled on light guide plate 11.Meanwhile, backboard is also positioned at the side that light guide plate 11 deviates from exiting surface, and abuts with reflector plate, is so also beneficial to the design simplifying backboard.
Preferably, frame bar 16 is white towards the surface color of transparent panel 13 side.Like this, when the light therethrough transparent panel 13 in light guide plate 11 side and penetrate on light guide plate 11 time, the light reflection of the overwhelming majority can return in transparent panel 13 by the surface of frame bar 16 white, to increase the brightness of the exiting surface of transparent panel 13, improves the utilization rate of light.Especially, when the bottom surface that frame bar 16 deviates from the first barricade 19 is concordant with the second plate face 15 of transparent panel 13, the side light leak of transparent panel 13 can also be avoided.
Preferably, three frame bars 16 are separately positioned on three sides of transparent panel 13.Like this, the structural strength of light guide plate 11 is strengthened from three sides of transparent panel 13.Simultaneously, article three, frame bar 16 all stretches out formation three the first barricades 19 from three of transparent panel 13 sides, only need abut against corresponding respectively for three of blooming piece 12 limit can complete accurate assembly with three the first barricades 19 when pasting blooming piece 12 like this on light guide plate 11.
More preferably, the outwardly formation second in side barricade 20, second barricade 20 that the exiting surface of transparent panel 13 does not arrange frame bar 16 protrudes from the exiting surface of transparent panel 13 and arranges with the first barricade 10 homonymy.First, the second barricade 20 can be used for positioning optical diaphragm 12.Secondly, blooming piece 12 protected by the second barricade 20, avoids blooming piece 12 to be collided with near the side of the second barricade 20 and rolls, comes off.Again, the side not arranging frame bar 16 of transparent panel 13 is incidence surface, and lamp bar is connected to this side.After being provided with the second barricade 20, incidence surface area increases, and the size of lamp bar also can increase accordingly, with the difficulty reducing the design of lamp bar, processing and assemble.
Composition graphs 3, the first barricade 19 and the second barricade 20 enclose formation one for holding the accommodation space of blooming piece 12, near the laterally inclined setting of this accommodation space on the second barricade 20, so that the installation and removal of blooming piece 12.
In one preferably embodiment, blooming piece 12 comprises diffusion sheet 17.Diffusion sheet 17 is arranged on the exiting surface of transparent panel 13.The side of diffusion sheet 17 is connected to the first barricade 19.Diffusion sheet 17 can comprise a large amount of transparent particle.Like this, light can reflect through during transparent particle, light beam repeatedly through after transparent particle to all directions scattering.When light is through being atomized after diffusion sheet 17, the light after atomization is softer, be more evenly distributed.
In one preferably embodiment, blooming piece 12 comprises prismatic lens 18.Prismatic lens 18 covers diffusion sheet 17 to deviate from the plate face of light guide plate 11.The side of diffusion sheet 17 is connected to the first barricade 19.Prismatic lens 18 is arranged on the some miniature of the side deviating from light guide plate 11 and the cusped edge be parallel to each other.The cross section of single cusped edge is similar to isosceles right triangle.The light of incident light only within a certain angular range of prismatic lens 18 just can pass prismatic lens 18, remaining light is reflected back diffusion sheet 17 because not meeting refracting condition by prismatic lens 18, then by the acting in conjunction of diffusion sheet 17 and reflector plate and directive prismatic lens 18 again.The brightness of prismatic lens 18 vertical direction can be increased like this.
Introduce a kind of method adopting two-shot molding process to manufacture above-mentioned light guide plate 11 below.This method comprises the following steps:
The polyphthalamide (PPA) of fusing is injected in the first mould, after the polyphthalamide cooling in the first mould, forms above-mentioned frame bar;
Frame bar is placed in the second mould, inject in the second mould fusing and temperature lower than the polymethyl methacrylate (PMMA) of the vicat softening temperature of polyphthalamide, after the polymethyl methacrylate cooling in the second mould, form above-mentioned transparent panel.
Like this, above-mentioned integrated light guide plate has just been produced.Because the vicat softening temperature of polyphthalamide is higher than the fusing point of polymethyl methacrylate, to second mould inject fusing and the polymethyl methacrylate that temperature is lower than the vicat softening temperature of polyphthalamide time, frame bar can not deliquescing or fusing because being heated, and frame bar can not produce deformation.Especially, the vicat softening temperature of polyphthalamide exceedes the fusing point 70 DEG C of polymethyl methacrylate, and lower to temperature control requirement, technique is simple.In addition, the intensity of the frame bar be made up of polyphthalamide is high.
Preferably, the temperature injecting polymethyl methacrylate in the second mould is 180 DEG C.
Preferably, the temperature injecting polyphthalamide in the first mould is 340 DEG C.
Vicat softening temperature can measure according to " thermoplastic vicat softening temperature (VST) " (GB/T 1633-2000).
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, various improvement can be carried out to it and parts wherein can be replaced with equivalent.Especially, only otherwise there is structural hazard, the every technical characteristic mentioned in each embodiment all can combine in any way.The present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (10)
1. a light guide plate, comprise: transparent panel and be arranged on transparent panel side, be parallel to that described side extends and frame bar integrated with transparent panel, described frame bar protrudes from described exiting surface place plane to be formed for the first barricade of positioning optical diaphragm near the side of the exiting surface of described transparent panel.
2. light guide plate according to claim 1, is characterized in that, the hardness of described frame bar is greater than the hardness of described transparent panel.
3. light guide plate according to claim 2, is characterized in that, described transparent panel is rectangular slab, and the two ends of described frame bar extend to two relative ends of described transparent panel respectively.
4. light guide plate according to claim 3, is characterized in that, the side that described frame bar deviates from described first barricade is concordant with the plate face that described transparent panel deviates from described exiting surface.
5. light guide plate according to claim 1, is characterized in that, described frame bar is white towards the surface color of the side of described transparent panel.
6. light guide plate according to any one of claim 1 to 5, is characterized in that, described transparent panel is polymethyl methacrylate product, and described frame bar is polyphthalamide goods, and described light guide plate adopts two-shot molding process to make.
7. the light guide plate according to any one of claim 2 to 4, is characterized in that, three described frame bars are separately positioned on three sides of described transparent panel.
8. light guide plate according to claim 7, is characterized in that, described exiting surface does not arrange the outwardly formation second in the side barricade of frame bar.
9. make a method for light guide plate according to any one of claim 1 to 8, it is characterized in that, comprise the following steps:
The polyphthalamide of fusing is injected in the first mould, after the polyphthalamide cooling in described first mould, forms described frame bar;
Described frame bar is placed in the second mould, inject in described second mould fusing and temperature lower than the polymethyl methacrylate of the vicat softening temperature of polyphthalamide, after the polymethyl methacrylate cooling in described second mould, form described transparent panel.
10. a backlight module, is characterized in that, comprising: light guide plate according to any one of claim 1 to 8, and covers the blooming piece on described exiting surface, and the side of described blooming piece is connected to described first barricade.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229644.2A CN104819440B (en) | 2015-05-07 | 2015-05-07 | Light guide plate and preparation method thereof, backlight module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229644.2A CN104819440B (en) | 2015-05-07 | 2015-05-07 | Light guide plate and preparation method thereof, backlight module |
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| CN104819440A true CN104819440A (en) | 2015-08-05 |
| CN104819440B CN104819440B (en) | 2017-12-05 |
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| CN201510229644.2A Active CN104819440B (en) | 2015-05-07 | 2015-05-07 | Light guide plate and preparation method thereof, backlight module |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109154744A (en) * | 2016-05-25 | 2019-01-04 | 索尼公司 | Luminescence unit, Liquid Crystal Module, display device and lighting system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200972512Y (en) * | 2006-08-18 | 2007-11-07 | 胜华科技股份有限公司 | Light plate and backlight module |
| CN104375233A (en) * | 2014-11-17 | 2015-02-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and displayer |
| CN104375323A (en) * | 2014-11-17 | 2015-02-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and displayer |
| CN104456426A (en) * | 2014-11-17 | 2015-03-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and displayer |
-
2015
- 2015-05-07 CN CN201510229644.2A patent/CN104819440B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200972512Y (en) * | 2006-08-18 | 2007-11-07 | 胜华科技股份有限公司 | Light plate and backlight module |
| CN104375233A (en) * | 2014-11-17 | 2015-02-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and displayer |
| CN104375323A (en) * | 2014-11-17 | 2015-02-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and displayer |
| CN104456426A (en) * | 2014-11-17 | 2015-03-25 | 深圳市华星光电技术有限公司 | Light guide plate, backlight module and displayer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109154744A (en) * | 2016-05-25 | 2019-01-04 | 索尼公司 | Luminescence unit, Liquid Crystal Module, display device and lighting system |
| US11726255B2 (en) | 2016-05-25 | 2023-08-15 | Saturn Licensing Llc | Light emitting unit, liquid crystal module, display device, and lighting system |
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| Publication number | Publication date |
|---|---|
| CN104819440B (en) | 2017-12-05 |
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